The cost of building a house extension can vary significantly depending on several factors. Here’s a breakdown of the key elements that influence the price:

1. Type of Extension

• Single-Story Extension: Typically the most affordable option, adding space to the ground floor.
• Double-Story Extension: Expanding both ground and first floors, offering more living space.
• Loft Conversion: Converting the attic into usable living space.
• Side Return Extension: Extending sideways from the back of the house.

2. Size and Complexity

• Square Footage: The larger the extension, the higher the cost.
• Design Complexity: Complex designs with intricate features can increase costs.

3. Materials

• Building Materials: The choice of materials, such as brick, timber, or modern cladding, affects the budget.
• Finishes: High-quality finishes like premium flooring or bespoke cabinetry can add to the cost.

4. Planning Permission

• Permitted Development: If your extension qualifies for permitted development, you might save on planning fees.
• Full Planning Application: A more complex application can increase costs.

5. Location

• Regional Variation: Labor and material costs can differ based on your location.
• Urban vs. Rural: Urban areas may have higher costs due to demand and accessibility.

6. Additional Features

• Kitchens and Bathrooms: These areas often require significant investment in fixtures and appliances.
• Plumbing and Electrical: Upgrading plumbing and electrical systems can add to the cost.
• Heating and Cooling: Installing new heating or cooling systems might be necessary.

Average Costs (2023)

Please note that these are estimates, and actual costs can vary significantly:

• Single-Story Extension: £30,000 — £60,000
• Double-Story Extension: £60,000 — £100,000
• Loft Conversion: £30,000 — £60,000

Obtaining Accurate Quotes

To get a precise estimate, it’s essential to obtain quotes from multiple builders. Provide them with detailed information about your project, including:

• Size and design
• Desired materials
• Any specific requirements

By understanding the factors that influence extension costs and obtaining accurate quotes, you can make informed decisions and plan your budget effectively.

Would you like to explore specific types of extensions or discuss financing options for your project? Learn More